A new CDC report provides more evidence that mRNA COVID-19 vaccines are effective in real-world conditions. In a large study among health care personnel, two doses of mRNA COVID-19 vaccines were 94% effective
at preventing symptomatic COVID19. Get a COVID-19 vaccine as soon as you can. People who receive an mRNA COVID-19 vaccine (Pfizer-BioNTech or Moderna) should get both recommended doses. Learn more: bit.ly/MMWR51421b.